#include <iostream>
#define ull unsigned long long
using namespace std;

ull OMI(ull a, ull b, ull s0 = 1, ull s1 = 0) {
    return b==0? s0: OMI(b, a%b, s1, s0 - s1*(a/b));
}

ull binomialCoeff(ull n, ull k) {
    ull res = 1;
    if (k > n - k)
        k = n - k;
    for (ull i = 0; i < k; ++i) {
        res *= (n - i);
        res /= (i + 1);
    }
    return res;
}

ull catalan(ull n) {
    ull c = binomialCoeff(2*n, n);
    ull temp = OMI(n + 1, 1000000007);
    return (c * ((temp < 0) ? (temp + 1000000007) : temp))%1000000007;
}

int main() {
    ull n;
    cin >> n;
    if(n == 1) {
        cout << 1;
        return 0;
    }
    cout << catalan(n) % 1000000007;
}